content: /*
   * Copyright 2011-2012 by Alexei Kaigorodov
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *     http://www.apache.org/licenses/LICENSE-2.0
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions
   * and limitations under the License.
   */
  package org.df4j.nio2.net;
  
  import org.df4j.core.port.InpSignal;
  
  import java.io.IOException;
  import java.nio.channels.AsynchronousSocketChannel;
  
  /**
   * Wrapper over {@link AsynchronousSocketChannel}.
   * Simplifies input-output, handling queues of I/O requests.
   */
  public class Connection {
      private final Long connSerialNum;
      private final InpSignal allowedConnections;
      private volatile AsynchronousSocketChannel channel;
      private boolean completed = false;
  
      public Connection(AsynchronousSocketChannel channel, Long connSerialNum, InpSignal allowedConnections) {
          this.connSerialNum = connSerialNum;
          this.allowedConnections = allowedConnections;
          this.channel=channel;
      }
  
      public Connection(AsynchronousSocketChannel assc, Long connSerialNum) {
          this(assc, connSerialNum, null);
      }
  
      public AsynchronousSocketChannel getChannel() {
          return channel;
      }
  
      public Long getConnSerialNum() {
          return connSerialNum;
      }
  
      /**
       *
       * @throws IOException
       *          If an I/O error occurs
       */
      public synchronized void close() throws IOException {
          if (completed) {
              return;
          }
          allowedConnections.release();
          channel.close();
          completed = true;
      }
  }
  